Lenovo — motherboard

Bought lenovo k8 note in jan 2018 and day by day the phone becomes hotter i thought it was due to my usage so i ignored. The issue increased so much that i cannot keep the phone on my ears to talk because of its heat. Suddenly on 30 march 2019 while using my whatsapp this phone starts hanging n it restarted automatically. From 5 pm the phone restarted continuously. Restart restart n restart n at 10 pm the phone got switched off n not getting started. I went to lenovo gallery vashi they told me motherboard problem 6500 will be the charges. N locally i m. Am unable to make it repaired. I hate lenovo. Meea pura paisa waste hua. Lenovo ka phone 14000 me liya tha n only 14 months hi chala. It's my request to lenovo to plz repair my handset or refund atpeast my half amount so that i can buy new phone. I m. Very much upset with lenovo handset. I m. From middle class family. Itna mushkil. Se phone liye the. Itna sambhal k use karti thi. But all in vain